package com.magima.utils;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.UUID;

import android.util.Log;

public class UploadUtil {
    private static final String TAG = "Upload file";
    private static final int TIME_OUT = 10*1000;   //超时时间
    private static final String CHARSET = "utf-8"; //设置编码
    private static HashMap<String, String> headers = null;
    
    public static void setGlobalHeader(HashMap<String, String> h){
    	headers = h;
    }
    
    public interface UploadProgressListener{
    	void onProgress(int progress);
    }
    /**
     * android上传文件到服务器
     * @param file  需要上传的文件
     * @param RequestURL  请求的url
     * @return  返回响应的内容
     */
    public static String uploadFile(File file,String RequestURL) {
    	if ( file != null )
    		return uploadFile( file, file.getName(), RequestURL);
    	return null;
    }
    public static String uploadFile(File file, String uploadFileName, String RequestURL) {
    	return uploadFile(file, uploadFileName, RequestURL, null);
    }
    public static String uploadFile(File file, String RequestURL, UploadProgressListener listener) {
    	return uploadFile(file, file.getName(), RequestURL, listener);
    }
    public static String uploadFile(File file, String uploadFileName, String RequestURL, UploadProgressListener listener)
    {
        String result = null;
        String  BOUNDARY =  UUID.randomUUID().toString();  //边界标识   随机生成
        String PREFIX = "--" , LINE_END = "\r\n"; 
        String CONTENT_TYPE = "multipart/form-data";   //内容类型
        
        BufferedReader br = null;
        try {
            URL url = new URL(RequestURL);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(TIME_OUT);
            conn.setConnectTimeout(TIME_OUT);
            conn.setDoInput(true);  //允许输入流
            conn.setDoOutput(true); //允许输出流
            conn.setUseCaches(false);  //不允许使用缓存
            conn.setRequestMethod("POST");  //请求方式
            conn.setRequestProperty("Charset", CHARSET);  //设置编码
            conn.setRequestProperty("connection", "keep-alive");   
            conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY); 
            
            if(headers != null){
    			@SuppressWarnings("rawtypes")
    			Iterator iter = headers.entrySet().iterator();
    			while (iter.hasNext()) {
    				@SuppressWarnings("rawtypes")
    				Map.Entry entry = (Map.Entry) iter.next();
    				String key = (String) entry.getKey();
    				String val = (String) entry.getValue();
    				
    				conn.setRequestProperty(key, val);
    			}
    		}
            if(file!=null)
            {
                /**
                 * 当文件不为空，把文件包装并且上传
                 */
                DataOutputStream dos = new DataOutputStream( conn.getOutputStream());
                StringBuilder sb = new StringBuilder();
                sb.append(PREFIX);
                sb.append(BOUNDARY);
                sb.append(LINE_END);
                /**
                 * 这里重点注意：
                 * name里面的值为服务器端需要key   只有这个key 才可以得到对应的文件
                 * filename是文件的名字，包含后缀名的   比如:abc.png  
                 */
                
                sb.append("Content-Disposition: form-data; name=\"img\"; filename=\"" + uploadFileName + "\"" + LINE_END); 
                sb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);
                sb.append(LINE_END);
                dos.write(sb.toString().getBytes());
                InputStream is = new FileInputStream(file);
                long totalSize = file.length();
                long uploaded = 0;
                int round = 0;
                byte[] bytes = new byte[1024];
                int len = 0;
                while((len=is.read(bytes))!=-1){
                    dos.write(bytes, 0, len);
                    if ( listener != null ) {
	                    uploaded += len;
	                    round ++;
	                    if ( round == 10 ) {
	                    	round = 0;
	                    	listener.onProgress(Math.round(uploaded*100/totalSize)); 
	                    }
                    }
                }
                if ( listener != null )
                	listener.onProgress(100);
                is.close();
                dos.write(LINE_END.getBytes());
                byte[] end_data = (PREFIX+BOUNDARY+PREFIX+LINE_END).getBytes();
                dos.write(end_data);
                dos.flush();
                /**
                 * 获取响应码  200=成功
                 * 当响应成功，获取响应的流  
                 */
                int res = conn.getResponseCode();  

                
                if(res==200){
                    InputStream input =  conn.getInputStream();
                    br = new BufferedReader(new InputStreamReader(input, CHARSET));
                    StringBuilder sb1= new StringBuilder();
                    int ss ;
                    while((ss=br.read())!=-1){
                        sb1.append((char)ss);
                    }
                    result = sb1.toString();
    				Log.e(TAG, "code : " + res + ", result = " + (String) result);
                }else{
                    Log.e(TAG, "code : " + res + ", ResponseMessag : " + conn.getResponseMessage());
                }
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
        	if(br !=  null){
        		try {
					br.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
        	}
        }
        return result;
    }    
}